GMC TROUBLE CODE

I Have A 2000 Cadillac Deville W/140,000 Miles On It. I Had A Diagnostic Done This Morning And Those Are The 2 Error Codes That Came Up....

I Just Bought This Pickup And The Service Engine Soon Light Has Come On And These Codes Are The Ones I Pulled Out. Can Anyone Direct Me...

Toook This To Gmc Dealer With That Code Said Cam Was Leaking From Seal Causing It And Replace Seal Code Removed Cam Back Code...

Please Help Me About This Coad Thanks.

Replaced Distributor Code Comes Back After About 200 Mile, Is There Another Adjustment

Truck Runs Good Changed O2sensor Light Keeps Coming On No Exhaust Leaks Or Vaccum Leaks How Do I Get Light To Stay Off?

What Can I Do To Fix And What Is Wrong

Is This An Injector Problem, I Also Have A P0340 Which Talks About A Sensor.

Evaporative Emission Control System Incorrect Purge Flow. How Can I Check Which Part Needs To Be Replaced, Charcoal Cannister, Purge...

I've Replaced The Valve Stem Seals, Plugs, Wires, Cap, Rotor, Cpi Fuel Injector Unit And It Still Runs Rough When It's Cold And Idling...